Is there a dynamesh feature (to sculpt) avaivable like in zbrush?
There is a different functionality (Dyntopo) but not quite like Dynamesh though.

Dynamesh will provide a nice quad topology, while Dyntopo will leave a nasty triangulated topology with many vertices having more than 4 edges - it will create triangle fans.

Triangle fans are big problem for Blender sculpting, because the smooth brush cannot smooth them perfectly (also in Zbrush there is an alternate smoothing method that can do that).

Dynamesh can also perform volumetric (and non-manifold) booleans on sculpted mesh. There isn't such functionality in Blender.